DC Motors In D.C. machines the residual magnetism is of the order of 10 to 15 percent 2 to 3 percent 50 to 75 percent 20 to 25 percent 10 to 15 percent 2 to 3 percent 50 to 75 percent 20 to 25 percent ANSWER DOWNLOAD EXAMIANS APP
DC Motors When the armature of a D.C. motor rotates, e.m.f. induced is None of these Back e.m.f. Self-induced e.m.f. Mutually induced e.m.f. None of these Back e.m.f. Self-induced e.m.f. Mutually induced e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc series motor is that which Can be started easily without load Has almost constant speed Has a poor torque Has its field winding consisting of thick wire and less turns Can be started easily without load Has almost constant speed Has a poor torque Has its field winding consisting of thick wire and less turns ANSWER DOWNLOAD EXAMIANS APP
DC Motors No load speed of which of the following motor will be highest? Cummulative compounded motor Series motor Differentially compounded motor Shunt motor Cummulative compounded motor Series motor Differentially compounded motor Shunt motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors Small dc motors up to 5 HP usually have 2 poles 6 poles 8 poles 4 poles 2 poles 6 poles 8 poles 4 poles ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the supply voltage for a D.C. motor is increased, which of the following will decrease? Full-load current All of these Starting torque Operating speed Full-load current All of these Starting torque Operating speed ANSWER DOWNLOAD EXAMIANS APP
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